Java RedissonClient.getLock方法代码示例

import org.redisson.api.RedissonClient; //导入方法依赖的package包/类
public static void main(String[] args) throws InterruptedException {
    // connects to 127.0.0.1:6379 by default
    RedissonClient redisson = Redisson.create();
    
    RLock lock = redisson.getLock("lock");
    lock.lock(2, TimeUnit.SECONDS);

    Thread t = new Thread() {
        public void run() {
            RLock lock1 = redisson.getLock("lock");
            lock1.lock();
            lock1.unlock();
        };
    };

    t.start();
    t.join();

    lock.unlock();
    
    redisson.shutdown();
}
 

import org.redisson.api.RedissonClient; //导入方法依赖的package包/类
@Override
public Object decode(Response response, Type type) throws IOException
{
    Collection<String> shopifyApiCallLimitHeader = response.headers().get("HTTP_X_SHOPIFY_SHOP_API_CALL_LIMIT");

    String[] callLimitValues = shopifyApiCallLimitHeader.iterator().next().split("/");

    if(callLimitValues[0] != null && callLimitValues[0] != "")
    {
        Long createdCalls = Long.parseLong(callLimitValues[0]);

        Long remainingCalls = _shopifyRedissonManager.calculateAvalableCredits(createdCalls);

        RedissonClient redisson = _shopifyRedissonManager.getRedissonClient();

        // Lock per shopify store. The lock is distributed, so it will work for multiple threads and applications.
        RLock lock = redisson.getLock(_shopifyRedissonManager.getMyShopifyUrl());

        RAtomicLong remainingCreditsAtomic = redisson.getAtomicLong(_shopifyRedissonManager.getRemainingCreditsKey());
        RAtomicLong lastRequestTimeAtomic = redisson.getAtomicLong(_shopifyRedissonManager.getLastRequestTimeKey());

        remainingCreditsAtomic.set(remainingCalls);
        lastRequestTimeAtomic.set(System.currentTimeMillis());

        lock.unlock();
    }

    return super.decode(response, type);
}
 

import org.redisson.api.RedissonClient; //导入方法依赖的package包/类
@Override
public void apply(RequestTemplate template)
{
    Boolean tryGetCredit = true;

    RedissonClient redisson = _shopifyRedissonManager.getRedissonClient();

    while (tryGetCredit)
    {
        // Lock per shopify store. The lock is distributed, so it will work for multiple threads and applications.
        RLock lock = redisson.getLock(_shopifyRedissonManager.getMyShopifyUrl());

        RAtomicLong isDefaultRemainingCreditsValueSet = redisson.getAtomicLong(_shopifyRedissonManager.getIsDefaultRemainingCreditsValueSetKey());

        RAtomicLong remainingCreditsAtomic = redisson.getAtomicLong(_shopifyRedissonManager.getRemainingCreditsKey());

        if(isDefaultRemainingCreditsValueSet.get() == 0)
        {
            remainingCreditsAtomic.set(_shopifyRedissonManager.getCreditLimit());
            isDefaultRemainingCreditsValueSet.set(1);
        }

        RAtomicLong lastRequestTimeAtomic = redisson.getAtomicLong(_shopifyRedissonManager.getLastRequestTimeKey());
        Long remainingCredits = remainingCreditsAtomic.get();

        if(remainingCredits > 0)
        {
            // These values are set here, because a request can be made while the current request is still in progress.
            // We set the actual values inside the decoder (when the request is complete), but if we don't set them here
            // as well a raised condition can occur.
            remainingCreditsAtomic.set(remainingCredits - 1);
            lastRequestTimeAtomic.set(System.currentTimeMillis());

            tryGetCredit = false;
            lock.unlock();
        }
        else
        {
            // Check if there were enough time since the last request time.
            // If the latest request's remaining calls were 0 and no calls were made after that, the remaining credits
            // will not be updated. This is why the last request time is used as well.
            long availableCalls = (long)Math.floor((System.currentTimeMillis() - lastRequestTimeAtomic.get())/500);

            if(availableCalls > 0)
            {
                remainingCreditsAtomic.set(availableCalls - 1);
                lastRequestTimeAtomic.set(System.currentTimeMillis());

                tryGetCredit = false;
                lock.unlock();
            }
            else
            {
                lock.unlock();

                try
                {
                    Thread.sleep(1000);
                }
                catch (InterruptedException e)
                {
                    System.out.println("Error while waiting for available Shopify call credit. " + e.getMessage());
                }
            }
        }
    }
}